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Abort a FETCH_COUNT-controlled query if we observe any I/O error on the

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output stream.  This typically indicates that the user quit out of $PAGER,
or that we are writing to a file and ran out of disk space.  In either case
we shouldn't bother to continue fetching data.

Stephen Frost
This commit is contained in:
Tom Lane 2010-05-28 20:02:32 +00:00
parent ece869b11e
commit 47d6d4485b
1 changed files with 22 additions and 8 deletions
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30
src/bin/psql/common.c
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@ -3,7 +3,7 @@
*
* Copyright (c) 2000-2010, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/bin/psql/common.c,v 1.144 2010/02/16 22:34:50 tgl Exp $
* $PostgreSQL: pgsql/src/bin/psql/common.c,v 1.145 2010/05/28 20:02:32 tgl Exp $
*/
#include "postgres_fe.h"
#include "common.h"
@ -982,6 +982,7 @@ ExecQueryUsingCursor(const char *query, double *elapsed_msec)
char fetch_cmd[64];
instr_time before,
after;
int flush_error;
*elapsed_msec = 0;
@ -1045,6 +1046,9 @@ ExecQueryUsingCursor(const char *query, double *elapsed_msec)
}
}
/* clear any pre-existing error indication on the output stream */
clearerr(pset.queryFout);
for (;;)
{
if (pset.timing)
@ -1096,19 +1100,29 @@ ExecQueryUsingCursor(const char *query, double *elapsed_msec)
printQuery(results, &my_popt, pset.queryFout, pset.logfile);
/*
* Make sure to flush the output stream, so intermediate results are
* visible to the client immediately.
*/
fflush(pset.queryFout);
PQclear(results);
/* after the first result set, disallow header decoration */
my_popt.topt.start_table = false;
my_popt.topt.prior_records += ntuples;
PQclear(results);
/*
* Make sure to flush the output stream, so intermediate results are
* visible to the client immediately. We check the results because
* if the pager dies/exits/etc, there's no sense throwing more data
* at it.
*/
flush_error = fflush(pset.queryFout);
if (ntuples < pset.fetch_count || cancel_pressed)
/*
* Check if we are at the end, if a cancel was pressed, or if
* there were any errors either trying to flush out the results,
* or more generally on the output stream at all. If we hit any
* errors writing things to the stream, we presume $PAGER has
* disappeared and stop bothering to pull down more data.
*/
if (ntuples < pset.fetch_count || cancel_pressed || flush_error ||
ferror(pset.queryFout))
break;
}